The demon kings mate?

Tara was a normal girl who did everything and anything her father asked her to do. on her birthday everything changed, with the death of her father she was sent to live with a family friend who just so happens to run True Cross and is once of the demon kings. What will happen to Tara when Amaimon takes an interest in her and how will she change this cruel uncaring demon king? How will Amaimon react to Tara when he realizes that he has odd feelings for her and doesn't know why she makes him feel at all?